How to capture multiple regex matches, from a single line, into the $matches magic variable in Powershell?
Let's say I have the string "blah blah F12 blah blah F32 blah blah blah" and I want to match the F12 and F32, how would I go about capturing both to the Powershell magic variable $matches?
If I run the following code in Powershell:
$string = "blah blah F12 blah blah F32 blah blah blah"
$string -match "F\d\d"
The $matches variable only contains F12
I also tried:
$string -match "(F\d\d)"
This time $matches had two items, but both are F12
I would like $matches to开发者_运维问答 contain both F12 and F32 for further processing. I just can't seem to find a way to do it.
All help would be greatly appreciated. :)
You can do this using Select-String in PowerShell 2.0 like so:
Select-String F\d\d -input $string -AllMatches | Foreach {$_.matches}
A while back I had asked for a -matchall
operator on MS Connect and this suggestion was closed as fixed with this comment:
"This is fixed with -allmatches parameter for select-string."
I suggest using this syntax as makes it easier to handle your array of matches:
$string = "blah blah F12 blah blah F32 blah blah blah" ;
$matches = ([regex]'F\d\d').Matches($string);
$matches[1].Value; # get matching value for second occurance, F32
I see 2 scenarios that are handled differently:
- extracting all matches of a single pattern
- extracting single match of multiple patterns
1. extract all matches of one pattern: select-string + -allmatches
- e.g. regex:
(?<=jobs).*
- counter-intuitive but you need to use
Select-String
to handle this like I am to get ids of nomad jobs from the output exemplified below
$m = "Watch the deployment in realtime at: https://nomad.foo.net/ui/jobs/20e183af-8243-11eb-a2af-0a58a9feac2a
08:23
Watch the deployment in realtime at: https://nomad.foo.net/ui/jobs/20e130e9-8243-11eb-a2af-0a58a9feac2a"
$r = "(?<=jobs/).*"
$l = Select-String $r -InputObject $m -AllMatches |
Foreach {$_.matches.Value}
20e183af-8243-11eb-a2af-0a58a9feac2a
20e130e9-8243-11eb-a2af-0a58a9feac2a
$l[0]
>>> 20e183af-8243-11eb-a2af-0a58a9feac2a
2. extract a single/first match of one/multiple patterns: capture groups and $Match[]
▶ $s = "Hello World from Mr Pavol"
▶ $r = "(World).*(Pavol)"
▶ $s -match $r
True
▶ $Matches
Name Value
---- -----
2 Pavol
1 World
0 World from Mr Pavol
$String = @'
MemberProgram PackageID="12345678" ProgramName="Install"/
MemberProgram PackageID="87654321" ProgramName="Install"/
MemberProgram PackageID="21436587" ProgramName="Install"/
MemberProgram PackageID="78563412" ProgramName="Install"/
'@
([regex]'(?<=PackageID=\")\d+(?=\")').Matches($String).value
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